CN106271968A - A kind of magnetorheological elastic polished take turns, small-bore aspherical mirror machining device and method - Google Patents
A kind of magnetorheological elastic polished take turns, small-bore aspherical mirror machining device and method Download PDFInfo
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- CN106271968A CN106271968A CN201610984157.1A CN201610984157A CN106271968A CN 106271968 A CN106271968 A CN 106271968A CN 201610984157 A CN201610984157 A CN 201610984157A CN 106271968 A CN106271968 A CN 106271968A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B13/00—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B13/00—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
- B24B13/01—Specific tools, e.g. bowl-like; Production, dressing or fastening of these tools
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- Mechanical Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
The invention discloses a kind of magnetorheological elastic polished take turns, small-bore aspherical mirror machining device and method.Described magnetorheological elastic polished wheel includes matrix material, the powdery abrasive material being arranged in matrix material and micron order magnetic-particle；Described powdery abrasive material is evenly distributed in matrix material or is stratified and set in matrix material；Described matrix material, powdery abrasive material form wheel-like structure together with micron order magnetic-particle, and magnetorheological elastic polished wheel is arranged in magnetic field.The present invention can form the steady removal function being smaller in size than small-bore aspheric-surface workpiece size, polishes the shape correction of being determined property face, grinding rear surface, it is thus achieved that the lossless optical surface of sub-nanometer roughness.
Description
Technical field
The present invention relates to a kind of magnetorheological elastic polished to take turns, small-bore aspherical mirror machining device and method, belong to ultraprecise
Optical processing technology field.
Background technology
Along with optics, electronics, communication, the developing rapidly of aeronautical and space technology, high-performance, in high precision, highly integrated photoelectricity
System continues to bring out, and optical processing technology is had higher requirement by the optical component with small aspheric surface as representative.Light
Learn the surface roughness that aspheric surface both requires to have Subnano-class, require to have again higher surface figure accuracy, and require sub-surface
Damage extremely low.
The small-bore aspheric surface of tradition (diameter < 10mm) processing typically employing ultra-precise cutting or superfine grinding, can obtain
The best surface roughness of Ra 2～3nm and the surface figure accuracy of PV about 100nm, but piece surface easily produces surface defect
And sub-surface damage layer, affect the surface quality of workpiece, it is necessary to polishing is eliminated, and carries out the shape correction of accurate face, further
Improve surface figure accuracy.
But, owing to processing space is narrow and small, tradition polishing instrument is difficult to enter the polishing realizing high-efficient automatic.Right
In small-bore aspheric surface, the most small-bore recessed aspheric surface, Chinese invention patent notification number CN 101564824 B discloses one
Planting the precise polishing method for small-bore aspheric surface polishing, the method can improve surface roughness, but is difficult to keep removing
Function is stable, it is impossible to grinding rear surface carries out the shape correction of accurate face, improves surface figure accuracy further.Chinese invention patent is announced
Number CN 102873643 B disclose a kind of utilize jet and negative pressure void effect for the method for small-bore aspheric surface polishing, should
Method device structure is complicated, because obtaining steady removal function, is not suitable for carrying out face shape correction processing.China's utility model is special
Profit notification number CN 203901076 U discloses one and utilizes ferrum gallium magnetostriction materials to carry out small-bore aspheric surface vibropolish
Method, the method is not because realizing the removal of the amount of determination, it is impossible to for face shape correction process.
Medium-large caliber aspheric surface (diameter > 10mm) processing and utilization has the polishing tool of steady removal function to optics aspheric
Face is processed, and calculates and controls to remove function and realizes the shape correction of definitiveness accurate face in the time of staying of each dwell point and add
Work.As Chinese invention patent publication number CN 1202848 A discloses a kind of carrier fluid wheeled magnetic flow liquid processing method, utilize arc
Optical element is polished by the magnetorheological ribbon of shape, can form steady removal function, it is achieved the high accuracy of Ra < 1nm and PV < 50nm
Ultraphotic sliding surface shape correction is processed.But, for the polishing tool of medium-large caliber aspherical mirror machining, remove function area relatively big, nothing
Method is applied to small-bore aspheric processing.
In sum, prior art is primarily present following problem for small-bore aspherical mirror machining:
1, existing ultraprecise car, mill process obtained surface roughness bigger than normal, easily cause surface and sub-surface damage；
2, existing polishing tool size is big, it is difficult to enters machining area and realizes high-efficient automatic polishing；
3, prior art cannot obtain the steady removal function being smaller in size than small-bore aspheric-surface workpiece bore, after grinding
The definitiveness face shape correction polishing of Subnano-class surface roughness is implemented on surface.
Summary of the invention
It is desirable to provide a kind of magnetorheological elastic polished take turns, small-bore aspherical mirror machining device and method, this processing
Device and processing method can form the steady removal function being smaller in size than small-bore aspheric-surface workpiece size, to grinding rear surface
Being determined property face shape correction polishing, it is thus achieved that the lossless optical surface of sub-nanometer roughness.
To achieve these goals, the technical solution adopted in the present invention is:
A kind of magnetorheological elastic polished taking turns, it is structurally characterized in that, including matrix material, the powdery being arranged in matrix material
Abrasive material and micron order magnetic-particle；Described powdery abrasive material is evenly distributed in matrix material or is stratified and set in matrix material；
Described matrix material, powdery abrasive material form wheel-like structure together with micron order magnetic-particle, and magnetorheological elastic polished take turns use
Time be arranged in magnetic field；The percent by volume of the most described micron order magnetic-particle elastic polished is taken turns less than magnetorheological
40%, the percent by volume of described micron power less than magnetorheological elastic polished take turns 10%, the most described micron power
Percent by volume is 5%～7%.
Preferred substrate material, powdery abrasive material and micron order magnetic-particle use solvent method or the preparation of mixing method to form described magnetic
Rheology is elastic polished takes turns.
According to embodiments of the invention, it is also possible to the present invention is further optimized, below for the skill formed after optimizing
Art scheme:
Described magnetic field is formed by power supply and solenoid, and the intensity in described magnetic field is adjustable.
Described matrix material is high molecular polymer matrix material, preferably thermoplastic elastomer, silicone rubber, natural rubber or
Synthetic rubber, described powdery abrasive material is preferably diadust, cerium oxide micropowder, alumina powder or silicon carbide micro-powder, described
Micron order magnetic-particle is ferro-cobalt powder, carbonyl iron dust or straight iron powder.
The particle diameter of described micron order magnetic-particle is 1～10 μm, and/or the particle diameter of described powdery abrasive material is 0.5～5 μm.
Based on same inventive concept, present invention also offers a kind of small-bore aspheric surface elastically regulating and controlling skin processing dress
Put, comprising:
For fixing the not magnetic conduction knife bar being connected with rotating main shaft,
Described magnetorheological elastic polished take turns, for small-bore aspheric-surface workpiece is polished；And
It is sleeved on the solenoid on not magnetic conduction knife bar；
For the described solenoid Accommodation that electrically connects with power supply in the magnetorheological elastic polished magnetic field size taken turns
Change the magnetorheological elastic polished elastic modelling quantity taken turns.
Preferably, described solenoid is close to magnetorheological elastic polished wheel and is arranged in magnetorheological elastic polished rear of taking turns, and
With not magnetic conduction knife bar matched in clearance.
Described magnetorheological elastic polished take turns and not magnetic conduction knife bar rotate time, solenoid keep static.
Described magnetorheological elastic polished wheel contacts with small-bore aspheric-surface workpiece, and this small-bore aspheric-surface workpiece is fixed on work
On part axle；Described workpiece spindle is arranged at an angle with not magnetic conduction knife bar；The most magnetorheological elastic polished wheel diameter is osculum to be processed
The 1/2～1 of footpath aspheric-surface workpiece diameter, the most described magnetorheological elastic polished wheel diameter is less than 10mm.
Based on same inventive concept, present invention also offers a kind of small-bore aspheric surface elastically regulating and controlling finishing processing device
The method being processed small-bore aspheric-surface workpiece, it comprises the steps:
1) small-bore aspheric-surface workpiece is arranged on the workpiece spindle of lathe, by described small-bore aspheric surface elastically regulating and controlling
Finishing processing device is arranged on machine tool chief axis；
2) adjust the workbench of lathe, make the magnetorheological elastic polished axis the taken turns axle relative to small-bore aspheric-surface workpiece
Line tilts；
3), before processing, small-bore aspheric-surface workpiece primary face shape Z is measured0(x, y), wherein (x y) is workpiece coordinate；
4) by primary face shape Z0(x, y) (x, y) compares, and calculating small-bore aspheric-surface workpiece needs everywhere with theoretical face shape Z
Throw remove material removal amount distribution HR (x, y), such as following formula:
HR (x, y)=Z0(x,y)-Z(x,y) (1)
In the course of processing, it is distributed according to above-mentioned material removal amount, adjusts solenoid current in good time, change and be applied to magnetic current
Become the elastic polished outside magnetic induction taken turns, thus regulate and control magnetorheological elastic polished to take turns elastic modelling quantity, make magnetorheological elasticity
Buff wheel contacts the small polishing speckle formed and has the distribution of different materials clearance with small-bore aspheric-surface workpiece different parts,
In small-bore aspheric-surface workpiece, different parts obtains different material removal amounts, it is achieved deterministic theory is processed, and tru(e)ing face shape obtains
Take the lossless optical surface of Subnano-class；
The change that preferably solenoid current is distributed with material removal amount can be represented by the formula:
Wherein (x, y) for coordinate on polishing workpiece, (x, y) solenoid current during place, t is magnetorheological elastic polished takes turns to I
On workpiece, (x, y) polishing time at place, k is the coefficient representing magnetorheological elastic polished buff polishing ability to coordinate, and v is small-bore
Aspheric-surface workpiece and magnetorheological elastic polished take turns between speed of related movement, f1Represent and magnetorheological elastic polished take turns elastic modelling quantity
About the inverse function of solenoid current, f2Represent pressure about the magnetorheological elastic polished inverse function taking turns elastic modelling quantity.
Step 3) in, elastic polished take turns as time cylindric when magnetorheological, the magnetorheological elastic polished end face taken turns and the face of cylinder
Contact with small-bore aspheric-surface workpiece at intersection rounding, form oval small polishing speckle, it is simple to obtain gaussian shaped profile
Remove function, reduce surface roughness；
Elastic polished taking turns as time spherical when magnetorheological, its sphere contacts with small-bore aspheric-surface workpiece, is formed circular small
Polishing speckle, it is simple to obtain the removal function of gaussian shaped profile, reduces surface roughness；
The most described small polishing speckle has the distribution of Gaussian material removing rate, i.e. material removing rate in polishing speckle center
Maximum, and successively decrease by normal distribution to polishing speckle periphery, it is shown below:
Wherein r represents other point on polishing speckle and arrives the distance throwing spot center, and MRR (r) represents to throw spot center as circle
The heart, r are the material removing rate on the circumference of radius, MRRmaxRepresenting the maximum material removing rate of polishing speckle center, σ is and throwing
The scale coefficient that facula area is relevant.
By said structure, the present invention includes magnetorheological elastic polished taking turns, not magnetic conduction knife bar, solenoid and power supply.Magnetic
The elastic polished size of wheel of rheology is close to or smaller than small-bore aspheric-surface workpiece, by magnetic conduction knife bar clamping is not on main shaft, relatively
Workpiece spindle keeps tilting, it is simple to magnetorheological elastic polished edge of taking turns enters aspherical mirror machining region formation steady removal function, real
Execute polishing.Solenoid elastic polished takes turns configuration in its rear near magnetorheological, elastic polished takes turns and not magnetic conduction cutter with magnetorheological
Bar keeps with one heart, and and magnetorheological elastic polished take turns and do not keep between magnetic conduction knife bar gap, not with magnetorheological elastic polished take turns and
Magnetic conduction knife bar does not rotates together.Power supply is connected with solenoid, makes solenoid produce electric current, forms the action of a magnetic field in magnetorheological
Elastic polished take turns.
Compared with prior art, the invention has the beneficial effects as follows:
The present invention, by regulation power supply, adjusts the electric current of solenoid, changes outside magnetic induction produced by solenoid
Intensity, thus regulate and control the magnetorheological elastic polished elastic modelling quantity taken turns, makes magnetorheological elastic polished take turns and small-bore aspheric-surface workpiece
Different parts contact forms the small polishing speckle with the distribution of different materials clearance, obtains everywhere in small-bore aspheric-surface workpiece
Different material removal amount, it is achieved deterministic theory is processed, and reaches the purpose of tru(e)ing face shape.
Meanwhile, the present invention magnetorheological elastic polished take turns by high molecular polymer matrix material, micron order magnetic-particle and
Micron power is mixed with and forms, and has elasticity under the action of a magnetic field, adds man-hour, and micron power penetraction depth is shallower, not rapid wear
Hinder small-bore aspheric-surface workpiece surface, the lossless optical surface of Subnano-class can be obtained.
Accompanying drawing explanation
Fig. 1 is the process principle figure of one embodiment of the invention；
Fig. 2 is of the present invention magnetorheological elastic polished to take turns schematic diagram, and wherein (a) is that abrasive material is uniformly distributed schematic diagram, (b)
For abrasive material layer distributed schematic diagram；
Fig. 3 is solenoid excitation field schematic diagram of the present invention；
Fig. 4 is small-bore aspheric surface elastically regulating and controlling skin processing schematic diagram.
In the drawings:
1-is magnetorheological elastic polished to take turns, 2-not magnetic conductive pole, 3-solenoid, 4-power supply, 5-main shaft, the small-bore aspheric surface of 6-
Workpiece, 7-computer, 8-workpiece spindle, 9-high molecular polymer matrix material, 10-micron order magnetic-particle, 11-micron power.
Detailed description of the invention
Below with reference to accompanying drawing and describe the present invention in detail in conjunction with the embodiments.It should be noted that in the feelings do not conflicted
Under condition, the embodiment in the present invention and the feature in embodiment can be mutually combined.For sake of convenience, hereinafter as occurred
On " ", D score, "left", "right" printed words, only represent consistent with the direction, upper and lower, left and right of accompanying drawing itself, structure is not played limit
It is set for using.
A kind of small-bore aspheric surface elastically regulating and controlling finishing processing device, sees Fig. 1, elastic polished takes turns 1, no including magnetorheological
Magnetic conduction knife bar 2, solenoid 3 and power supply 4.Solenoid 3 is close to magnetorheological elastic polished takes turns 1 configuration in its rear, with magnetic current
Become elastic polished take turns 1 and not magnetic conduction knife bar 2 keep concentric.Power supply 4 is connected with solenoid 3, makes solenoid 3 produce magnetic field and makees
Elastic polished 1 is taken turns for magnetorheological.Solenoid 3 and magnetorheological elastic polished take turns 1 and do not keep gap between magnetic conduction knife bar 2, when
Magnetorheological elastic polished taking turns 1 and time magnetic conduction knife bar 2 does not rotates, solenoid 3 keeps static.
See Fig. 2, magnetorheological elastic polished take turns 1 by high molecular polymer matrix material 9, micron order magnetic-particle 10 and micro-
Grinding material 11 uniformly mixes, and uses solvent method or mixing method to be prepared from.Seeing Fig. 2 a, micron power 11 is permissible in buff wheel
It is to be uniformly distributed；Seeing Fig. 2 b, micron power 11 can also be storied placement in buff wheel.
Seeing Fig. 3, power supply 4 is connected with solenoid 3, makes solenoid 3 produce electric current, forms magnetic field.By regulation electricity
Source 4, the electric current of adjustable solenoid 3, thus change outside magnetic induction produced by solenoid 3.
Seeing Fig. 4, add man-hour, small-bore aspheric-surface workpiece 6 clamping is on workpiece spindle 8.Small-bore aspheric surface elastically regulating and controlling
Burnishing device is by not magnetic conduction knife bar 2 clamping on main shaft 5, and opposite piece axle 8 keeps tilting, it is simple to magnetorheological elastic polished
The machining area taking turns the 1 small-bore aspheric-surface workpiece 6 of edge entrance contacts.Main shaft 5 drives magnetorheological elastic polished takes turns 1 together
Rotate, it is achieved skin processing.Due to small-bore aspheric-surface workpiece 6 material removal amount everywhere and differ, computer 7 can root
According to different material removal amount timely adjustment power supplys 4, adjusting the electric current of solenoid 3, change is applied to magnetorheological elastic polished
Outside magnetic induction on wheel 1, thus regulate and control magnetorheological elastic polished take turns 1 elastic modelling quantity, make magnetorheological elastic polished to take turns 1
Contact the small polishing speckle formed with small-bore aspheric-surface workpiece 6 different parts and there is the distribution of different materials clearance, at osculum
In footpath aspheric-surface workpiece 6, different parts obtains different material removal amounts, it is achieved deterministic theory is processed, and reaches tru(e)ing face shape mesh
's.Meanwhile, magnetorheological elastic polished 1 is taken turns by high molecular polymer matrix material 9, micron order magnetic-particle 10 and micron power 11
Being mixed with and form, have elasticity under the action of a magnetic field, add man-hour, micron power 11 penetraction depth is shallower, not easy damaged osculum
Footpath aspheric-surface workpiece 6 surface, can obtain the lossless optical surface of Subnano-class.
Described magnetorheological elastic polished 1 diameter of taking turns is generally less than 10mm.Preferred version is, magnetorheological elastic polished to take turns 1 straight
Footpath is the 1/2～1 of small-bore aspheric-surface workpiece diameter to be processed.
Described magnetorheological elastic polished take turns 1 and be fabricated to cylindric and end face and face of cylinder intersection rounding, it is also possible to make
Balling-up head or other shape.
It is described that magnetorheological elastic polished to take turns 1 main by high molecular polymer matrix material such as thermoplastic elastomer, silicone rubber, sky
So rubber or various synthetic rubber etc., micron order magnetic-particle such as ferro-cobalt powder, carbonyl iron dust or straight iron powder etc. of particle diameter 1～10 μm
And micron power such as diadust, cerium oxide micropowder, alumina powder or the silicon carbide micro-powder etc. of particle diameter 0.5～5 μm are uniform
Mixing, uses solvent method or mixing method to be prepared from.
Described high molecular polymer matrix material percent by volume is usually no more than 50%, described micron order magnetic-particle body
Long-pending percentage ratio is usually no more than 40%, and described micron power content is usually no more than 10%, and preferred version is 5%～7%.
Described micron power both can be to be uniformly distributed in buff wheel, it is also possible to is storied placement.
Described magnetorheological elastic polished take turns 1 coaxial with solenoid 3, and near solenoid 3 and keep certain interval.
By regulating the electric current of solenoid 4, it is strong that change is applied to the magnetorheological elastic polished outside magnetic induction taken turns on 1
Degree, can realize the magnetorheological elastic polished regulation and control taking turns 1 elastic modelling quantity.
Described not magnetic conduction knife bar 2 is coaxial with solenoid 3, and keeps certain interval.
The method utilizing above-mentioned processing unit (plant) to be processed workpiece comprises the steps:
1) small-bore aspheric-surface workpiece is arranged on super-precision machine tools workpiece spindle, rotates with workpiece spindle；
2) elastically regulating and controlling burnishing device is arranged on super-precision machine tools main shaft, rotates with main shaft；
3) adjust super-precision machine tools workbench, make magnetorheological elastic polished wheel axis relative to small-bore aspheric surface work
Part axis tilts.Elastic polished take turns as time cylindric when magnetorheological, non-with small-bore at its end face and face of cylinder intersection rounding
Spherical workpiece contacts, and forms oval small polishing speckle, it is simple to obtain the removal function of gaussian shaped profile, reduces rough surface
Degree；Elastic polished taking turns as time spherical when magnetorheological, its sphere contacts with small-bore aspheric-surface workpiece, forms circular small polishing
Speckle, it is simple to obtain the removal function of gaussian shaped profile, reduces surface roughness.
4), before processing, small-bore aspheric-surface workpiece primary face shape Z is measured0(x, y).Surface shape measurement can be off-line measurement
(as used Form Talysurf contact surface profile measuring instrument or UA3P surface configuration to measure with roughness measuring instrument etc.)
Or on-line measurement (the ruby point contact type measuring instrument as used super-precision machine tools to carry is measured), preferred version is online
Measure.
5) by primary face shape Z0(x, y) (x, y) compares, and calculating small-bore aspheric-surface workpiece needs everywhere with theoretical face shape Z
Throw the material removal amount distribution removed, such as following formula,
HR (x, y)=Z0(x,y)-Z(x,y) (1)
Wherein (x y) is the quantity of material distribution needing in the finishing stage to remove to HR.In the course of processing, remove according to above-mentioned material
Amount distribution, computer adjusts solenoid current in good time, and it is strong that change is applied to the magnetorheological elastic polished outside magnetic induction taken turns
Degree, thus regulate and control magnetorheological elastic polished to take turns elastic modelling quantity, make magnetorheological elastic polished take turns different from small-bore aspheric-surface workpiece
The small polishing speckle that location contacts is formed has the distribution of different materials clearance, and in small-bore aspheric-surface workpiece, different parts obtains
Obtain different material removal amounts, it is achieved deterministic theory is processed, tru(e)ing face shape, obtain the lossless optical surface of Subnano-class.Electromagnetism
The change that coil current is distributed with material removal amount can be represented by the formula,
Wherein (x, y) for coordinate on polishing workpiece, (x, y) solenoid current during place, t is magnetorheological elastic polished takes turns to I
On workpiece, (x, y) polishing time at place, k is the coefficient representing magnetorheological elastic polished buff polishing ability to coordinate, and v is small-bore
Aspheric-surface workpiece and magnetorheological elastic polished take turns between speed of related movement, f1Represent and magnetorheological elastic polished take turns elastic modelling quantity
About the inverse function of solenoid current, f2Represent pressure about the magnetorheological elastic polished inverse function taking turns elastic modelling quantity.
Step 3) described in small throwing facula area be generally less than the 1/2 of small-bore aspheric-surface workpiece area.Preferred version
For, small throwing facula area is the 1/5～1/3 of small-bore aspheric-surface workpiece area.
Step 3) described in small polishing speckle have Gaussian material removing rate distribution, i.e. material removing rate polishing speckle in
Maximum at the heart, and successively decrease by normal distribution to polishing speckle periphery, it is shown below,
Wherein r represent polishing speckle on other point to throw spot center distance, MRR (r) be with throwing spot center as the center of circle,
R is the material removing rate on the circumference of radius, MRRmaxFor polishing the maximum material removing rate of speckle center, σ is and polishing speckle face
Long-pending relevant scale coefficient.
The content that above-described embodiment illustrates should be understood to that these embodiments are only used for being illustrated more clearly that the present invention, and not
For limiting the scope of the present invention, after having read the present invention, the those skilled in the art's various equivalent form of values to the present invention
Amendment each fall within the application claims limited range.
Claims (10)
1. magnetorheological elastic polished take turns for one kind, it is characterised in that include matrix material, the powdery abrasive material being arranged in matrix material
With micron order magnetic-particle；Described powdery abrasive material is evenly distributed in matrix material or is stratified and set in matrix material；Described
Matrix material, powdery abrasive material form wheel-like structure together with micron order magnetic-particle, and magnetorheological elastic polished set when taking turns use
Put in magnetic field；The percent by volume of the most described micron order magnetic-particle less than magnetorheological elastic polished take turns 40%, institute
State the percent by volume of micron power less than magnetorheological elastic polished take turns 10%, the most described micron power volume basis
Ratio is 5%～7%.
The most according to claim 1 magnetorheological elastic polished take turns, it is characterised in that described magnetic field is by power supply and solenoid
Being formed, the intensity in described magnetic field is adjustable.
The most according to claim 1 magnetorheological elastic polished take turns, it is characterised in that described matrix material is high molecular polymerization
Thing matrix material, preferably thermoplastic elastomer, silicone rubber, natural rubber or synthetic rubber, described powdery abrasive material is preferably Buddha's warrior attendant
Stone micropowder, cerium oxide micropowder, alumina powder or silicon carbide micro-powder, described micron order magnetic-particle is ferro-cobalt powder, carbonyl iron dust
Or straight iron powder.
The most according to claim 1 magnetorheological elastic polished take turns, it is characterised in that the particle diameter of described micron order magnetic-particle
It is 1～10 μm, and/or the particle diameter of described powdery abrasive material is 0.5～5 μm.
5. a small-bore aspheric surface elastically regulating and controlling finishing processing device, it is characterised in that including:
For not magnetic conduction knife bar (2) that be connected fixing with rotating main shaft (5)；
Magnetorheological elastic polished as described in one of claim 1-4 takes turns (1), for carrying out small-bore aspheric-surface workpiece (6)
Polishing；
And it is sleeved on the solenoid (3) on not magnetic conduction knife bar (2), for the described solenoid electrically connected with power supply (4)
(3) Accommodation changes the magnetorheological elastic polished springform taking turns (1) in the magnetorheological elastic polished magnetic field size taking turns (1)
Amount.
Small-bore aspheric surface elastically regulating and controlling finishing processing device the most according to claim 5, it is characterised in that described electromagnetism
Coil (3) is close to magnetorheological elastic polished take turns (1) and is arranged in magnetorheological elastic polished (1) rear of taking turns, and with not magnetic conduction knife bar (2)
Matched in clearance.
Small-bore aspheric surface elastically regulating and controlling finishing processing device the most according to claim 5, it is characterised in that described magnetic current
Become elastic polished take turns (1) and not magnetic conduction knife bar (2) rotate time, solenoid (3) keeps static.
Small-bore aspheric surface elastically regulating and controlling finishing processing device the most according to claim 5, it is characterised in that described magnetic current
Becoming elastic polished take turns (1) to contact with small-bore aspheric-surface workpiece (6), this small-bore aspheric-surface workpiece (6) is fixed on workpiece spindle (8)
On；Described workpiece spindle (8) is arranged at an angle with not magnetic conduction knife bar (2)；The most magnetorheological elastic polished take turns (1) is a diameter of to be processed
The 1/2～1 of small-bore aspheric-surface workpiece diameter, the most described magnetorheological elastic polished (1) diameter of taking turns is less than 10mm.
9. the small-bore aspheric surface elastically regulating and controlling finishing processing device utilized described in one of claim 5-8 is to small-bore non-
The method that spherical workpiece is processed, it is characterised in that comprise the steps:
1) small-bore aspheric-surface workpiece (6) is arranged on the workpiece spindle (8) of lathe, by as described in one of claim 5-8
Small-bore aspheric surface elastically regulating and controlling finishing processing device is arranged on machine tool chief axis (5)；
2) adjust the workbench of lathe, make the magnetorheological elastic polished axis taken turns incline relative to the axis of small-bore aspheric-surface workpiece
Tiltedly；
3), before processing, small-bore aspheric-surface workpiece primary face shape Z is measured0(x, y), wherein (x y) is workpiece coordinate；；
4) by primary face shape Z0(x, y) (x, y) compares, and calculating small-bore aspheric-surface workpiece needs everywhere to throw and remove with theoretical face shape Z
Material removal amount distribution HR (x, y), such as following formula:
HR (x, y)=Z0(x,y)-Z(x,y) (1)
In the course of processing, it is distributed according to above-mentioned material removal amount, adjusts solenoid current in good time, change and be applied to magnetorheological bullet
Outside magnetic induction on property buff wheel, thus regulate and control magnetorheological elastic polished elastic modelling quantity of taking turns, make magnetorheological elastic polished
Wheel contacts the small polishing speckle formed and has the distribution of different materials clearance, at osculum with small-bore aspheric-surface workpiece different parts
In the aspheric-surface workpiece of footpath, different parts obtains different material removal amounts, it is achieved deterministic theory is processed, tru(e)ing face shape, obtains Asia
The lossless optical surface of nanoscale；
The change that preferably solenoid current is distributed with material removal amount can be represented by the formula:
Wherein (x, y) for coordinate on polishing workpiece, (x, y) solenoid current during place, t is magnetorheological elastic polished takes turns in work to I
On part, (x, y) polishing time at place, k is the coefficient representing magnetorheological elastic polished buff polishing ability to coordinate, and v is small-bore aspheric
Face workpiece and magnetorheological elastic polished take turns between speed of related movement, f1Represent magnetorheological elastic polished take turns elastic modelling quantity about
The inverse function of solenoid current, f2Represent pressure about the magnetorheological elastic polished inverse function taking turns elastic modelling quantity.
The method the most small-bore aspheric-surface workpiece being processed, it is characterised in that step 3) in,
Elastic polished take turns as time cylindric when magnetorheological, at the magnetorheological elastic polished end face taken turns and face of cylinder intersection rounding and osculum
Footpath aspheric-surface workpiece contact, forms oval small polishing speckle, it is simple to obtain the removal function of gaussian shaped profile, reduces surface thick
Rugosity；
Elastic polished taking turns as time spherical when magnetorheological, its sphere contacts with small-bore aspheric-surface workpiece, forms circular small polishing
Speckle, it is simple to obtain the removal function of gaussian shaped profile, reduces surface roughness；The most described small polishing speckle has Gauss section bar
Material clearance distribution, i.e. material removing rate are maximum in polishing speckle center, and successively decrease by normal distribution to polishing speckle periphery, as follows
Shown in formula:
Wherein r represent polishing speckle on other point to throw spot center distance, MRR (r) represent with throw spot center as the center of circle, r
For the material removing rate on the circumference of radius, MRRmaxRepresenting the maximum material removing rate of polishing speckle center, σ is and polishing speckle
The scale coefficient that area is relevant.
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